创建WordPress模板

i need someone based on wordpress to build a simple database system for my staff to do research. There will have a Step 1: Research Input Page (User and admin) a) staff input location product_name market_price product_links and source_links source_cost weight; b) weight can calculate a shipping cost based on 4 formula for 4 countries; Step 2: Product table page (User and admin) c) show up all of the above input information; d) calculate the weight cost and show margin (only available to admin); Step 3: Confirmed Sourcing page (User and admin) e) from Product table page admin can pick right product and move to a confirmed page; f) additional form need to fill in e.g. product picture link, description and nature of product e.t.c. Step 4: Ready Purchase page (User and admin) g) when step 3 completed admin can move to this page; h) and it should have a function to export Please ensure we want to use in wordpress structure as easier to work on but if any one can recommend a open source ERP (product purchase system) we are also delighted.